it is on an episode of scrubs, where turk and JD do the
dance in differnt parts of the episode because they are
happy about something.

to do the dance, start bobbing up and down on the spot, then pretend to put your left hand on the top of a stearing wheel of a bus, and move it side to side, like you are turning the bus, then pretend to pull the level that opens the doors with your right hand while looking towards the imaginary doors, then close them again, if you feel like it pretend to wave passengers on with your right hand, and repeat this over and over until u have proven your point that you have just owned someone.

its pretty amusing to do, but JD and turk do it the best

docter cox:- (looking through a window at turk) Is he doing the bus driver !?!?